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Field applications of entomopathogenic fungi against Rhagoletis cerasi

Daniel, C. and Wyss, E. (2008) Field applications of entomopathogenic fungi against Rhagoletis cerasi. In: Boos, Markus (Ed.) Ecofruit - 13th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 18thFebruary to 20th February 2008 at Weinsberg/Germany, pp. 87-92.

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Summary

Two myco-insecticides, Naturalis-L (Beauveria bassiana) and PreFeRal®WG
(Paecilomyces fumosoroseus), were applied against adult R. cerasi (Diptera: Tephritidae)
in two orchards in north-western Switzerland in summer 2006. Both products were applied
at a concentration of 5.75x104 CFU / ml. With four applications at seven day intervals the
whole flight period of R. cerasi was fully covered. During this period (5th June – 6th July)
the temperature averaged 19.2°C, total precipitation was 60 mm. Under these conditions
Naturalis-L significantly reduced the number of damaged fruit (efficacy: 69-74%), whereas
damage was not significantly reduced with PreFeRal®WG (efficacy: 27%). Fungus
infested flies were found on the yellow sticky traps proving that the myco-insecticides
worked as predicted.
Climatic conditions were different in 2007: temperature averaged 15.9°C (16th May – 4th
July), total precipitation was 281 mm. In 2007 only Naturalis-L was tested: with five
applications an efficacy of 73% and 78% was obtained on the cherry varieties Langstieler
and Dolleseppler, respectively. However, for the latest ripening and most infested variety
Schauenburger only an efficacy of 18% was observed. In these cherries a high number of
young larvae were found indicating that the efficacy was low at the end of the treatment
period. In conclusion a control of R. cerasi with myco-insecticides seems possible.
However, application regime still has to be improved and should not only be adapted to the
flight period of R. cerasi, but also to the cherry varieties.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Rhagoletis cerasi, Biocontrol, Beauveria bassiana, Paecilomyces fumosoroseus
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Entomolgy
International Conferences > 2008: Ecofruit
Related Links:http://www.ecofruit.net
Deposited By: Tagung, Ecofruit
ID Code:13650
Deposited On:24 Jul 2008
Last Modified:12 Apr 2010 07:37
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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